--- title: Timer Wheel timers at shutdown | daily.dev description: A continuation of a long-running series on real-world multithreaded C++ code walks through adding shutdown support to a timer wheel implementation. The post... canonical: https://daily.dev/posts/timer-wheel-timers-at-shutdown-tq3ug5eii twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Timer Wheel timers at shutdown | daily.dev og:description: A continuation of a long-running series on real-world multithreaded C++ code walks through adding shutdown support to a timer wheel implementation. The post... og:url: https://daily.dev/posts/timer-wheel-timers-at-shutdown-tq3ug5eii og:image: https://api.daily.dev/og/posts/Tq3uG5eII.png og:image:alt: Timer Wheel timers at shutdown og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Timer Wheel timers at shutdown **[Rambling Comments](https://daily.dev/sources/lenholgate)** · 6 min read · 0 upvotes · 0 comments ## Summary A continuation of a long-running series on real-world multithreaded C++ code walks through adding shutdown support to a timer wheel implementation. The post covers writing unit tests for BeginShutdown() and WaitForShutdownToComplete(), then works through the thread-safety issues that arise when shutdown can be triggered concurrently with timeout handling, including the need for locked lists of collected and processed timers. Source code for both stages is published on GitHub under the MIT license, and the next installment will extend the work to the timer queue implementation. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Timers pending at shutdown](https://daily.dev/posts/timers-pending-at-shutdown-w3r7iwp1b) · Rambling Comments · 1 upvotes · 1 comments - [Practical Testing: 43](https://daily.dev/posts/practical-testing-43-bcfdxy2eh) · Rambling Comments · 0 upvotes · 0 comments - [Time in C\+\+: Once More About Testing](https://daily.dev/posts/time-in-c-once-more-about-testing-xgwh6hhhf) · Sandor Dargo · 1 upvotes · 0 comments - [All About Jest, Timers, and Mocks](https://daily.dev/posts/all-about-jest-timers-and-mocks-uvpmlenzh) · Liran Tal · 0 upvotes · 0 comments --- Tags: [#testing](https://daily.dev/tags/testing), [#c++](https://daily.dev/tags/c++), [#tdd](https://daily.dev/tags/tdd) [View this post on daily.dev](https://daily.dev/posts/timer-wheel-timers-at-shutdown-tq3ug5eii) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Timer Wheel timers at shutdown","url":"https://daily.dev/posts/timer-wheel-timers-at-shutdown-tq3ug5eii","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/timer-wheel-timers-at-shutdown-tq3ug5eii"},"datePublished":"2026-09-30T09:14:10.039Z","dateModified":"2026-09-30T09:14:28.425Z","description":"A continuation of a long-running series on real-world multithreaded C++ code walks through adding shutdown support to a timer wheel implementation. 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